| /* |
| * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| #include <string.h> |
| |
| #include <algorithm> |
| #include <map> |
| #include <memory> |
| #include <vector> |
| |
| #include "webrtc/audio/audio_receive_stream.h" |
| #include "webrtc/audio/audio_send_stream.h" |
| #include "webrtc/audio/audio_state.h" |
| #include "webrtc/audio/scoped_voe_interface.h" |
| #include "webrtc/base/checks.h" |
| #include "webrtc/base/constructormagic.h" |
| #include "webrtc/base/logging.h" |
| #include "webrtc/base/thread_annotations.h" |
| #include "webrtc/base/thread_checker.h" |
| #include "webrtc/base/trace_event.h" |
| #include "webrtc/call.h" |
| #include "webrtc/call/bitrate_allocator.h" |
| #include "webrtc/call/rtc_event_log.h" |
| #include "webrtc/config.h" |
| #include "webrtc/modules/bitrate_controller/include/bitrate_controller.h" |
| #include "webrtc/modules/congestion_controller/include/congestion_controller.h" |
| #include "webrtc/modules/pacing/paced_sender.h" |
| #include "webrtc/modules/rtp_rtcp/include/rtp_header_parser.h" |
| #include "webrtc/modules/rtp_rtcp/source/byte_io.h" |
| #include "webrtc/modules/utility/include/process_thread.h" |
| #include "webrtc/system_wrappers/include/clock.h" |
| #include "webrtc/system_wrappers/include/cpu_info.h" |
| #include "webrtc/system_wrappers/include/critical_section_wrapper.h" |
| #include "webrtc/system_wrappers/include/metrics.h" |
| #include "webrtc/system_wrappers/include/rw_lock_wrapper.h" |
| #include "webrtc/system_wrappers/include/trace.h" |
| #include "webrtc/video/call_stats.h" |
| #include "webrtc/video/send_delay_stats.h" |
| #include "webrtc/video/video_receive_stream.h" |
| #include "webrtc/video/video_send_stream.h" |
| #include "webrtc/video/vie_remb.h" |
| #include "webrtc/voice_engine/include/voe_codec.h" |
| |
| namespace webrtc { |
| |
| const int Call::Config::kDefaultStartBitrateBps = 300000; |
| |
| namespace internal { |
| |
| class Call : public webrtc::Call, |
| public PacketReceiver, |
| public CongestionController::Observer, |
| public BitrateAllocator::LimitObserver { |
| public: |
| explicit Call(const Call::Config& config); |
| virtual ~Call(); |
| |
| PacketReceiver* Receiver() override; |
| |
| webrtc::AudioSendStream* CreateAudioSendStream( |
| const webrtc::AudioSendStream::Config& config) override; |
| void DestroyAudioSendStream(webrtc::AudioSendStream* send_stream) override; |
| |
| webrtc::AudioReceiveStream* CreateAudioReceiveStream( |
| const webrtc::AudioReceiveStream::Config& config) override; |
| void DestroyAudioReceiveStream( |
| webrtc::AudioReceiveStream* receive_stream) override; |
| |
| webrtc::VideoSendStream* CreateVideoSendStream( |
| const webrtc::VideoSendStream::Config& config, |
| const VideoEncoderConfig& encoder_config) override; |
| void DestroyVideoSendStream(webrtc::VideoSendStream* send_stream) override; |
| |
| webrtc::VideoReceiveStream* CreateVideoReceiveStream( |
| webrtc::VideoReceiveStream::Config configuration) override; |
| void DestroyVideoReceiveStream( |
| webrtc::VideoReceiveStream* receive_stream) override; |
| |
| Stats GetStats() const override; |
| |
| DeliveryStatus DeliverPacket(MediaType media_type, |
| const uint8_t* packet, |
| size_t length, |
| const PacketTime& packet_time) override; |
| |
| void SetBitrateConfig( |
| const webrtc::Call::Config::BitrateConfig& bitrate_config) override; |
| |
| void SignalChannelNetworkState(MediaType media, NetworkState state) override; |
| |
| void OnNetworkRouteChanged(const std::string& transport_name, |
| const rtc::NetworkRoute& network_route) override; |
| |
| void OnSentPacket(const rtc::SentPacket& sent_packet) override; |
| |
| // Implements BitrateObserver. |
| void OnNetworkChanged(uint32_t bitrate_bps, uint8_t fraction_loss, |
| int64_t rtt_ms) override; |
| |
| // Implements BitrateAllocator::LimitObserver. |
| void OnAllocationLimitsChanged(uint32_t min_send_bitrate_bps, |
| uint32_t max_padding_bitrate_bps) override; |
| |
| bool StartEventLog(rtc::PlatformFile log_file, |
| int64_t max_size_bytes) override { |
| return event_log_->StartLogging(log_file, max_size_bytes); |
| } |
| |
| void StopEventLog() override { event_log_->StopLogging(); } |
| |
| private: |
| DeliveryStatus DeliverRtcp(MediaType media_type, const uint8_t* packet, |
| size_t length); |
| DeliveryStatus DeliverRtp(MediaType media_type, |
| const uint8_t* packet, |
| size_t length, |
| const PacketTime& packet_time); |
| void ConfigureSync(const std::string& sync_group) |
| EXCLUSIVE_LOCKS_REQUIRED(receive_crit_); |
| |
| VoiceEngine* voice_engine() { |
| internal::AudioState* audio_state = |
| static_cast<internal::AudioState*>(config_.audio_state.get()); |
| if (audio_state) |
| return audio_state->voice_engine(); |
| else |
| return nullptr; |
| } |
| |
| void UpdateSendHistograms() EXCLUSIVE_LOCKS_REQUIRED(&bitrate_crit_); |
| void UpdateReceiveHistograms(); |
| void UpdateAggregateNetworkState(); |
| |
| Clock* const clock_; |
| |
| const int num_cpu_cores_; |
| const std::unique_ptr<ProcessThread> module_process_thread_; |
| const std::unique_ptr<ProcessThread> pacer_thread_; |
| const std::unique_ptr<CallStats> call_stats_; |
| const std::unique_ptr<BitrateAllocator> bitrate_allocator_; |
| Call::Config config_; |
| rtc::ThreadChecker configuration_thread_checker_; |
| |
| NetworkState audio_network_state_; |
| NetworkState video_network_state_; |
| |
| std::unique_ptr<RWLockWrapper> receive_crit_; |
| // Audio and Video receive streams are owned by the client that creates them. |
| std::map<uint32_t, AudioReceiveStream*> audio_receive_ssrcs_ |
| GUARDED_BY(receive_crit_); |
| std::map<uint32_t, VideoReceiveStream*> video_receive_ssrcs_ |
| GUARDED_BY(receive_crit_); |
| std::set<VideoReceiveStream*> video_receive_streams_ |
| GUARDED_BY(receive_crit_); |
| std::map<std::string, AudioReceiveStream*> sync_stream_mapping_ |
| GUARDED_BY(receive_crit_); |
| |
| std::unique_ptr<RWLockWrapper> send_crit_; |
| // Audio and Video send streams are owned by the client that creates them. |
| std::map<uint32_t, AudioSendStream*> audio_send_ssrcs_ GUARDED_BY(send_crit_); |
| std::map<uint32_t, VideoSendStream*> video_send_ssrcs_ GUARDED_BY(send_crit_); |
| std::set<VideoSendStream*> video_send_streams_ GUARDED_BY(send_crit_); |
| |
| VideoSendStream::RtpStateMap suspended_video_send_ssrcs_; |
| |
| std::unique_ptr<webrtc::RtcEventLog> event_log_; |
| |
| // The following members are only accessed (exclusively) from one thread and |
| // from the destructor, and therefore doesn't need any explicit |
| // synchronization. |
| int64_t received_video_bytes_; |
| int64_t received_audio_bytes_; |
| int64_t received_rtcp_bytes_; |
| int64_t first_rtp_packet_received_ms_; |
| int64_t last_rtp_packet_received_ms_; |
| int64_t first_packet_sent_ms_; |
| |
| // TODO(holmer): Remove this lock once BitrateController no longer calls |
| // OnNetworkChanged from multiple threads. |
| rtc::CriticalSection bitrate_crit_; |
| int64_t estimated_send_bitrate_sum_kbits_ GUARDED_BY(&bitrate_crit_); |
| int64_t pacer_bitrate_sum_kbits_ GUARDED_BY(&bitrate_crit_); |
| uint32_t min_allocated_send_bitrate_bps_ GUARDED_BY(&bitrate_crit_); |
| int64_t num_bitrate_updates_ GUARDED_BY(&bitrate_crit_); |
| |
| std::map<std::string, rtc::NetworkRoute> network_routes_; |
| |
| VieRemb remb_; |
| const std::unique_ptr<CongestionController> congestion_controller_; |
| const std::unique_ptr<SendDelayStats> video_send_delay_stats_; |
| |
| RTC_DISALLOW_COPY_AND_ASSIGN(Call); |
| }; |
| } // namespace internal |
| |
| Call* Call::Create(const Call::Config& config) { |
| return new internal::Call(config); |
| } |
| |
| namespace internal { |
| |
| Call::Call(const Call::Config& config) |
| : clock_(Clock::GetRealTimeClock()), |
| num_cpu_cores_(CpuInfo::DetectNumberOfCores()), |
| module_process_thread_(ProcessThread::Create("ModuleProcessThread")), |
| pacer_thread_(ProcessThread::Create("PacerThread")), |
| call_stats_(new CallStats(clock_)), |
| bitrate_allocator_(new BitrateAllocator(this)), |
| config_(config), |
| audio_network_state_(kNetworkUp), |
| video_network_state_(kNetworkUp), |
| receive_crit_(RWLockWrapper::CreateRWLock()), |
| send_crit_(RWLockWrapper::CreateRWLock()), |
| event_log_(RtcEventLog::Create(webrtc::Clock::GetRealTimeClock())), |
| received_video_bytes_(0), |
| received_audio_bytes_(0), |
| received_rtcp_bytes_(0), |
| first_rtp_packet_received_ms_(-1), |
| last_rtp_packet_received_ms_(-1), |
| first_packet_sent_ms_(-1), |
| estimated_send_bitrate_sum_kbits_(0), |
| pacer_bitrate_sum_kbits_(0), |
| min_allocated_send_bitrate_bps_(0), |
| num_bitrate_updates_(0), |
| remb_(clock_), |
| congestion_controller_( |
| new CongestionController(clock_, this, &remb_, event_log_.get())), |
| video_send_delay_stats_(new SendDelayStats(clock_)) { |
| RTC_DCHECK(configuration_thread_checker_.CalledOnValidThread()); |
| RTC_DCHECK_GE(config.bitrate_config.min_bitrate_bps, 0); |
| RTC_DCHECK_GE(config.bitrate_config.start_bitrate_bps, |
| config.bitrate_config.min_bitrate_bps); |
| if (config.bitrate_config.max_bitrate_bps != -1) { |
| RTC_DCHECK_GE(config.bitrate_config.max_bitrate_bps, |
| config.bitrate_config.start_bitrate_bps); |
| } |
| |
| Trace::CreateTrace(); |
| call_stats_->RegisterStatsObserver(congestion_controller_.get()); |
| |
| congestion_controller_->SetBweBitrates( |
| config_.bitrate_config.min_bitrate_bps, |
| config_.bitrate_config.start_bitrate_bps, |
| config_.bitrate_config.max_bitrate_bps); |
| |
| module_process_thread_->Start(); |
| module_process_thread_->RegisterModule(call_stats_.get()); |
| module_process_thread_->RegisterModule(congestion_controller_.get()); |
| pacer_thread_->RegisterModule(congestion_controller_->pacer()); |
| pacer_thread_->RegisterModule( |
| congestion_controller_->GetRemoteBitrateEstimator(true)); |
| pacer_thread_->Start(); |
| } |
| |
| Call::~Call() { |
| RTC_DCHECK(!remb_.InUse()); |
| RTC_DCHECK(configuration_thread_checker_.CalledOnValidThread()); |
| UpdateSendHistograms(); |
| UpdateReceiveHistograms(); |
| RTC_CHECK(audio_send_ssrcs_.empty()); |
| RTC_CHECK(video_send_ssrcs_.empty()); |
| RTC_CHECK(video_send_streams_.empty()); |
| RTC_CHECK(audio_receive_ssrcs_.empty()); |
| RTC_CHECK(video_receive_ssrcs_.empty()); |
| RTC_CHECK(video_receive_streams_.empty()); |
| |
| pacer_thread_->Stop(); |
| pacer_thread_->DeRegisterModule(congestion_controller_->pacer()); |
| pacer_thread_->DeRegisterModule( |
| congestion_controller_->GetRemoteBitrateEstimator(true)); |
| module_process_thread_->DeRegisterModule(congestion_controller_.get()); |
| module_process_thread_->DeRegisterModule(call_stats_.get()); |
| module_process_thread_->Stop(); |
| call_stats_->DeregisterStatsObserver(congestion_controller_.get()); |
| Trace::ReturnTrace(); |
| } |
| |
| void Call::UpdateSendHistograms() { |
| if (num_bitrate_updates_ == 0 || first_packet_sent_ms_ == -1) |
| return; |
| int64_t elapsed_sec = |
| (clock_->TimeInMilliseconds() - first_packet_sent_ms_) / 1000; |
| if (elapsed_sec < metrics::kMinRunTimeInSeconds) |
| return; |
| int send_bitrate_kbps = |
| estimated_send_bitrate_sum_kbits_ / num_bitrate_updates_; |
| int pacer_bitrate_kbps = pacer_bitrate_sum_kbits_ / num_bitrate_updates_; |
| if (send_bitrate_kbps > 0) { |
| RTC_LOGGED_HISTOGRAM_COUNTS_100000("WebRTC.Call.EstimatedSendBitrateInKbps", |
| send_bitrate_kbps); |
| } |
| if (pacer_bitrate_kbps > 0) { |
| RTC_LOGGED_HISTOGRAM_COUNTS_100000("WebRTC.Call.PacerBitrateInKbps", |
| pacer_bitrate_kbps); |
| } |
| } |
| |
| void Call::UpdateReceiveHistograms() { |
| if (first_rtp_packet_received_ms_ == -1) |
| return; |
| int64_t elapsed_sec = |
| (last_rtp_packet_received_ms_ - first_rtp_packet_received_ms_) / 1000; |
| if (elapsed_sec < metrics::kMinRunTimeInSeconds) |
| return; |
| int audio_bitrate_kbps = received_audio_bytes_ * 8 / elapsed_sec / 1000; |
| int video_bitrate_kbps = received_video_bytes_ * 8 / elapsed_sec / 1000; |
| int rtcp_bitrate_bps = received_rtcp_bytes_ * 8 / elapsed_sec; |
| if (video_bitrate_kbps > 0) { |
| RTC_LOGGED_HISTOGRAM_COUNTS_100000("WebRTC.Call.VideoBitrateReceivedInKbps", |
| video_bitrate_kbps); |
| } |
| if (audio_bitrate_kbps > 0) { |
| RTC_LOGGED_HISTOGRAM_COUNTS_100000("WebRTC.Call.AudioBitrateReceivedInKbps", |
| audio_bitrate_kbps); |
| } |
| if (rtcp_bitrate_bps > 0) { |
| RTC_LOGGED_HISTOGRAM_COUNTS_100000("WebRTC.Call.RtcpBitrateReceivedInBps", |
| rtcp_bitrate_bps); |
| } |
| RTC_LOGGED_HISTOGRAM_COUNTS_100000( |
| "WebRTC.Call.BitrateReceivedInKbps", |
| audio_bitrate_kbps + video_bitrate_kbps + rtcp_bitrate_bps / 1000); |
| } |
| |
| PacketReceiver* Call::Receiver() { |
| // TODO(solenberg): Some test cases in EndToEndTest use this from a different |
| // thread. Re-enable once that is fixed. |
| // RTC_DCHECK(configuration_thread_checker_.CalledOnValidThread()); |
| return this; |
| } |
| |
| webrtc::AudioSendStream* Call::CreateAudioSendStream( |
| const webrtc::AudioSendStream::Config& config) { |
| TRACE_EVENT0("webrtc", "Call::CreateAudioSendStream"); |
| RTC_DCHECK(configuration_thread_checker_.CalledOnValidThread()); |
| AudioSendStream* send_stream = new AudioSendStream( |
| config, config_.audio_state, congestion_controller_.get()); |
| { |
| WriteLockScoped write_lock(*send_crit_); |
| RTC_DCHECK(audio_send_ssrcs_.find(config.rtp.ssrc) == |
| audio_send_ssrcs_.end()); |
| audio_send_ssrcs_[config.rtp.ssrc] = send_stream; |
| } |
| send_stream->SignalNetworkState(audio_network_state_); |
| UpdateAggregateNetworkState(); |
| return send_stream; |
| } |
| |
| void Call::DestroyAudioSendStream(webrtc::AudioSendStream* send_stream) { |
| TRACE_EVENT0("webrtc", "Call::DestroyAudioSendStream"); |
| RTC_DCHECK(configuration_thread_checker_.CalledOnValidThread()); |
| RTC_DCHECK(send_stream != nullptr); |
| |
| send_stream->Stop(); |
| |
| webrtc::internal::AudioSendStream* audio_send_stream = |
| static_cast<webrtc::internal::AudioSendStream*>(send_stream); |
| { |
| WriteLockScoped write_lock(*send_crit_); |
| size_t num_deleted = audio_send_ssrcs_.erase( |
| audio_send_stream->config().rtp.ssrc); |
| RTC_DCHECK(num_deleted == 1); |
| } |
| UpdateAggregateNetworkState(); |
| delete audio_send_stream; |
| } |
| |
| webrtc::AudioReceiveStream* Call::CreateAudioReceiveStream( |
| const webrtc::AudioReceiveStream::Config& config) { |
| TRACE_EVENT0("webrtc", "Call::CreateAudioReceiveStream"); |
| RTC_DCHECK(configuration_thread_checker_.CalledOnValidThread()); |
| AudioReceiveStream* receive_stream = |
| new AudioReceiveStream(congestion_controller_.get(), config, |
| config_.audio_state, event_log_.get()); |
| { |
| WriteLockScoped write_lock(*receive_crit_); |
| RTC_DCHECK(audio_receive_ssrcs_.find(config.rtp.remote_ssrc) == |
| audio_receive_ssrcs_.end()); |
| audio_receive_ssrcs_[config.rtp.remote_ssrc] = receive_stream; |
| ConfigureSync(config.sync_group); |
| } |
| receive_stream->SignalNetworkState(audio_network_state_); |
| UpdateAggregateNetworkState(); |
| return receive_stream; |
| } |
| |
| void Call::DestroyAudioReceiveStream( |
| webrtc::AudioReceiveStream* receive_stream) { |
| TRACE_EVENT0("webrtc", "Call::DestroyAudioReceiveStream"); |
| RTC_DCHECK(configuration_thread_checker_.CalledOnValidThread()); |
| RTC_DCHECK(receive_stream != nullptr); |
| webrtc::internal::AudioReceiveStream* audio_receive_stream = |
| static_cast<webrtc::internal::AudioReceiveStream*>(receive_stream); |
| { |
| WriteLockScoped write_lock(*receive_crit_); |
| size_t num_deleted = audio_receive_ssrcs_.erase( |
| audio_receive_stream->config().rtp.remote_ssrc); |
| RTC_DCHECK(num_deleted == 1); |
| const std::string& sync_group = audio_receive_stream->config().sync_group; |
| const auto it = sync_stream_mapping_.find(sync_group); |
| if (it != sync_stream_mapping_.end() && |
| it->second == audio_receive_stream) { |
| sync_stream_mapping_.erase(it); |
| ConfigureSync(sync_group); |
| } |
| } |
| UpdateAggregateNetworkState(); |
| delete audio_receive_stream; |
| } |
| |
| webrtc::VideoSendStream* Call::CreateVideoSendStream( |
| const webrtc::VideoSendStream::Config& config, |
| const VideoEncoderConfig& encoder_config) { |
| TRACE_EVENT0("webrtc", "Call::CreateVideoSendStream"); |
| RTC_DCHECK(configuration_thread_checker_.CalledOnValidThread()); |
| |
| video_send_delay_stats_->AddSsrcs(config); |
| // TODO(mflodman): Base the start bitrate on a current bandwidth estimate, if |
| // the call has already started. |
| VideoSendStream* send_stream = new VideoSendStream( |
| num_cpu_cores_, module_process_thread_.get(), call_stats_.get(), |
| congestion_controller_.get(), bitrate_allocator_.get(), |
| video_send_delay_stats_.get(), &remb_, event_log_.get(), config, |
| encoder_config, suspended_video_send_ssrcs_); |
| { |
| WriteLockScoped write_lock(*send_crit_); |
| for (uint32_t ssrc : config.rtp.ssrcs) { |
| RTC_DCHECK(video_send_ssrcs_.find(ssrc) == video_send_ssrcs_.end()); |
| video_send_ssrcs_[ssrc] = send_stream; |
| } |
| video_send_streams_.insert(send_stream); |
| } |
| send_stream->SignalNetworkState(video_network_state_); |
| UpdateAggregateNetworkState(); |
| event_log_->LogVideoSendStreamConfig(config); |
| return send_stream; |
| } |
| |
| void Call::DestroyVideoSendStream(webrtc::VideoSendStream* send_stream) { |
| TRACE_EVENT0("webrtc", "Call::DestroyVideoSendStream"); |
| RTC_DCHECK(send_stream != nullptr); |
| RTC_DCHECK(configuration_thread_checker_.CalledOnValidThread()); |
| |
| send_stream->Stop(); |
| |
| VideoSendStream* send_stream_impl = nullptr; |
| { |
| WriteLockScoped write_lock(*send_crit_); |
| auto it = video_send_ssrcs_.begin(); |
| while (it != video_send_ssrcs_.end()) { |
| if (it->second == static_cast<VideoSendStream*>(send_stream)) { |
| send_stream_impl = it->second; |
| video_send_ssrcs_.erase(it++); |
| } else { |
| ++it; |
| } |
| } |
| video_send_streams_.erase(send_stream_impl); |
| } |
| RTC_CHECK(send_stream_impl != nullptr); |
| |
| VideoSendStream::RtpStateMap rtp_state = send_stream_impl->GetRtpStates(); |
| |
| for (VideoSendStream::RtpStateMap::iterator it = rtp_state.begin(); |
| it != rtp_state.end(); |
| ++it) { |
| suspended_video_send_ssrcs_[it->first] = it->second; |
| } |
| |
| UpdateAggregateNetworkState(); |
| delete send_stream_impl; |
| } |
| |
| webrtc::VideoReceiveStream* Call::CreateVideoReceiveStream( |
| webrtc::VideoReceiveStream::Config configuration) { |
| TRACE_EVENT0("webrtc", "Call::CreateVideoReceiveStream"); |
| RTC_DCHECK(configuration_thread_checker_.CalledOnValidThread()); |
| VideoReceiveStream* receive_stream = new VideoReceiveStream( |
| num_cpu_cores_, congestion_controller_.get(), std::move(configuration), |
| voice_engine(), module_process_thread_.get(), call_stats_.get(), &remb_); |
| |
| const webrtc::VideoReceiveStream::Config& config = receive_stream->config(); |
| { |
| WriteLockScoped write_lock(*receive_crit_); |
| RTC_DCHECK(video_receive_ssrcs_.find(config.rtp.remote_ssrc) == |
| video_receive_ssrcs_.end()); |
| video_receive_ssrcs_[config.rtp.remote_ssrc] = receive_stream; |
| // TODO(pbos): Configure different RTX payloads per receive payload. |
| VideoReceiveStream::Config::Rtp::RtxMap::const_iterator it = |
| config.rtp.rtx.begin(); |
| if (it != config.rtp.rtx.end()) |
| video_receive_ssrcs_[it->second.ssrc] = receive_stream; |
| video_receive_streams_.insert(receive_stream); |
| ConfigureSync(config.sync_group); |
| } |
| receive_stream->SignalNetworkState(video_network_state_); |
| UpdateAggregateNetworkState(); |
| event_log_->LogVideoReceiveStreamConfig(config); |
| return receive_stream; |
| } |
| |
| void Call::DestroyVideoReceiveStream( |
| webrtc::VideoReceiveStream* receive_stream) { |
| TRACE_EVENT0("webrtc", "Call::DestroyVideoReceiveStream"); |
| RTC_DCHECK(configuration_thread_checker_.CalledOnValidThread()); |
| RTC_DCHECK(receive_stream != nullptr); |
| VideoReceiveStream* receive_stream_impl = nullptr; |
| { |
| WriteLockScoped write_lock(*receive_crit_); |
| // Remove all ssrcs pointing to a receive stream. As RTX retransmits on a |
| // separate SSRC there can be either one or two. |
| auto it = video_receive_ssrcs_.begin(); |
| while (it != video_receive_ssrcs_.end()) { |
| if (it->second == static_cast<VideoReceiveStream*>(receive_stream)) { |
| if (receive_stream_impl != nullptr) |
| RTC_DCHECK(receive_stream_impl == it->second); |
| receive_stream_impl = it->second; |
| video_receive_ssrcs_.erase(it++); |
| } else { |
| ++it; |
| } |
| } |
| video_receive_streams_.erase(receive_stream_impl); |
| RTC_CHECK(receive_stream_impl != nullptr); |
| ConfigureSync(receive_stream_impl->config().sync_group); |
| } |
| UpdateAggregateNetworkState(); |
| delete receive_stream_impl; |
| } |
| |
| Call::Stats Call::GetStats() const { |
| // TODO(solenberg): Some test cases in EndToEndTest use this from a different |
| // thread. Re-enable once that is fixed. |
| // RTC_DCHECK(configuration_thread_checker_.CalledOnValidThread()); |
| Stats stats; |
| // Fetch available send/receive bitrates. |
| uint32_t send_bandwidth = 0; |
| congestion_controller_->GetBitrateController()->AvailableBandwidth( |
| &send_bandwidth); |
| std::vector<unsigned int> ssrcs; |
| uint32_t recv_bandwidth = 0; |
| congestion_controller_->GetRemoteBitrateEstimator(false)->LatestEstimate( |
| &ssrcs, &recv_bandwidth); |
| stats.send_bandwidth_bps = send_bandwidth; |
| stats.recv_bandwidth_bps = recv_bandwidth; |
| stats.pacer_delay_ms = congestion_controller_->GetPacerQueuingDelayMs(); |
| stats.rtt_ms = call_stats_->rtcp_rtt_stats()->LastProcessedRtt(); |
| return stats; |
| } |
| |
| void Call::SetBitrateConfig( |
| const webrtc::Call::Config::BitrateConfig& bitrate_config) { |
| TRACE_EVENT0("webrtc", "Call::SetBitrateConfig"); |
| RTC_DCHECK(configuration_thread_checker_.CalledOnValidThread()); |
| RTC_DCHECK_GE(bitrate_config.min_bitrate_bps, 0); |
| if (bitrate_config.max_bitrate_bps != -1) |
| RTC_DCHECK_GT(bitrate_config.max_bitrate_bps, 0); |
| if (config_.bitrate_config.min_bitrate_bps == |
| bitrate_config.min_bitrate_bps && |
| (bitrate_config.start_bitrate_bps <= 0 || |
| config_.bitrate_config.start_bitrate_bps == |
| bitrate_config.start_bitrate_bps) && |
| config_.bitrate_config.max_bitrate_bps == |
| bitrate_config.max_bitrate_bps) { |
| // Nothing new to set, early abort to avoid encoder reconfigurations. |
| return; |
| } |
| config_.bitrate_config = bitrate_config; |
| congestion_controller_->SetBweBitrates(bitrate_config.min_bitrate_bps, |
| bitrate_config.start_bitrate_bps, |
| bitrate_config.max_bitrate_bps); |
| } |
| |
| void Call::SignalChannelNetworkState(MediaType media, NetworkState state) { |
| RTC_DCHECK(configuration_thread_checker_.CalledOnValidThread()); |
| switch (media) { |
| case MediaType::AUDIO: |
| audio_network_state_ = state; |
| break; |
| case MediaType::VIDEO: |
| video_network_state_ = state; |
| break; |
| case MediaType::ANY: |
| case MediaType::DATA: |
| RTC_NOTREACHED(); |
| break; |
| } |
| |
| UpdateAggregateNetworkState(); |
| { |
| ReadLockScoped read_lock(*send_crit_); |
| for (auto& kv : audio_send_ssrcs_) { |
| kv.second->SignalNetworkState(audio_network_state_); |
| } |
| for (auto& kv : video_send_ssrcs_) { |
| kv.second->SignalNetworkState(video_network_state_); |
| } |
| } |
| { |
| ReadLockScoped read_lock(*receive_crit_); |
| for (auto& kv : audio_receive_ssrcs_) { |
| kv.second->SignalNetworkState(audio_network_state_); |
| } |
| for (auto& kv : video_receive_ssrcs_) { |
| kv.second->SignalNetworkState(video_network_state_); |
| } |
| } |
| } |
| |
| // TODO(honghaiz): Add tests for this method. |
| void Call::OnNetworkRouteChanged(const std::string& transport_name, |
| const rtc::NetworkRoute& network_route) { |
| RTC_DCHECK(configuration_thread_checker_.CalledOnValidThread()); |
| // Check if the network route is connected. |
| if (!network_route.connected) { |
| LOG(LS_INFO) << "Transport " << transport_name << " is disconnected"; |
| // TODO(honghaiz): Perhaps handle this in SignalChannelNetworkState and |
| // consider merging these two methods. |
| return; |
| } |
| |
| // Check whether the network route has changed on each transport. |
| auto result = |
| network_routes_.insert(std::make_pair(transport_name, network_route)); |
| auto kv = result.first; |
| bool inserted = result.second; |
| if (inserted) { |
| // No need to reset BWE if this is the first time the network connects. |
| return; |
| } |
| if (kv->second != network_route) { |
| kv->second = network_route; |
| LOG(LS_INFO) << "Network route changed on transport " << transport_name |
| << ": new local network id " << network_route.local_network_id |
| << " new remote network id " << network_route.remote_network_id |
| << " Reset bitrate to " |
| << config_.bitrate_config.start_bitrate_bps << "bps"; |
| congestion_controller_->ResetBweAndBitrates( |
| config_.bitrate_config.start_bitrate_bps, |
| config_.bitrate_config.min_bitrate_bps, |
| config_.bitrate_config.max_bitrate_bps); |
| } |
| } |
| |
| void Call::UpdateAggregateNetworkState() { |
| RTC_DCHECK(configuration_thread_checker_.CalledOnValidThread()); |
| |
| bool have_audio = false; |
| bool have_video = false; |
| { |
| ReadLockScoped read_lock(*send_crit_); |
| if (audio_send_ssrcs_.size() > 0) |
| have_audio = true; |
| if (video_send_ssrcs_.size() > 0) |
| have_video = true; |
| } |
| { |
| ReadLockScoped read_lock(*receive_crit_); |
| if (audio_receive_ssrcs_.size() > 0) |
| have_audio = true; |
| if (video_receive_ssrcs_.size() > 0) |
| have_video = true; |
| } |
| |
| NetworkState aggregate_state = kNetworkDown; |
| if ((have_video && video_network_state_ == kNetworkUp) || |
| (have_audio && audio_network_state_ == kNetworkUp)) { |
| aggregate_state = kNetworkUp; |
| } |
| |
| LOG(LS_INFO) << "UpdateAggregateNetworkState: aggregate_state=" |
| << (aggregate_state == kNetworkUp ? "up" : "down"); |
| |
| congestion_controller_->SignalNetworkState(aggregate_state); |
| } |
| |
| void Call::OnSentPacket(const rtc::SentPacket& sent_packet) { |
| if (first_packet_sent_ms_ == -1) |
| first_packet_sent_ms_ = clock_->TimeInMilliseconds(); |
| video_send_delay_stats_->OnSentPacket(sent_packet.packet_id, |
| clock_->TimeInMilliseconds()); |
| congestion_controller_->OnSentPacket(sent_packet); |
| } |
| |
| void Call::OnNetworkChanged(uint32_t target_bitrate_bps, uint8_t fraction_loss, |
| int64_t rtt_ms) { |
| bitrate_allocator_->OnNetworkChanged(target_bitrate_bps, fraction_loss, |
| rtt_ms); |
| |
| { |
| rtc::CritScope lock(&bitrate_crit_); |
| // We only update these stats if we have send streams, and assume that |
| // OnNetworkChanged is called roughly with a fixed frequency. |
| estimated_send_bitrate_sum_kbits_ += target_bitrate_bps / 1000; |
| // Pacer bitrate might be higher than bitrate estimate if enforcing min |
| // bitrate. |
| uint32_t pacer_bitrate_bps = |
| std::max(target_bitrate_bps, min_allocated_send_bitrate_bps_); |
| pacer_bitrate_sum_kbits_ += pacer_bitrate_bps / 1000; |
| ++num_bitrate_updates_; |
| } |
| } |
| |
| void Call::OnAllocationLimitsChanged(uint32_t min_send_bitrate_bps, |
| uint32_t max_padding_bitrate_bps) { |
| congestion_controller_->SetAllocatedSendBitrateLimits( |
| min_send_bitrate_bps, max_padding_bitrate_bps); |
| rtc::CritScope lock(&bitrate_crit_); |
| min_allocated_send_bitrate_bps_ = min_send_bitrate_bps; |
| } |
| |
| void Call::ConfigureSync(const std::string& sync_group) { |
| // Set sync only if there was no previous one. |
| if (voice_engine() == nullptr || sync_group.empty()) |
| return; |
| |
| AudioReceiveStream* sync_audio_stream = nullptr; |
| // Find existing audio stream. |
| const auto it = sync_stream_mapping_.find(sync_group); |
| if (it != sync_stream_mapping_.end()) { |
| sync_audio_stream = it->second; |
| } else { |
| // No configured audio stream, see if we can find one. |
| for (const auto& kv : audio_receive_ssrcs_) { |
| if (kv.second->config().sync_group == sync_group) { |
| if (sync_audio_stream != nullptr) { |
| LOG(LS_WARNING) << "Attempting to sync more than one audio stream " |
| "within the same sync group. This is not " |
| "supported in the current implementation."; |
| break; |
| } |
| sync_audio_stream = kv.second; |
| } |
| } |
| } |
| if (sync_audio_stream) |
| sync_stream_mapping_[sync_group] = sync_audio_stream; |
| size_t num_synced_streams = 0; |
| for (VideoReceiveStream* video_stream : video_receive_streams_) { |
| if (video_stream->config().sync_group != sync_group) |
| continue; |
| ++num_synced_streams; |
| if (num_synced_streams > 1) { |
| // TODO(pbos): Support synchronizing more than one A/V pair. |
| // https://code.google.com/p/webrtc/issues/detail?id=4762 |
| LOG(LS_WARNING) << "Attempting to sync more than one audio/video pair " |
| "within the same sync group. This is not supported in " |
| "the current implementation."; |
| } |
| // Only sync the first A/V pair within this sync group. |
| if (sync_audio_stream != nullptr && num_synced_streams == 1) { |
| video_stream->SetSyncChannel(voice_engine(), |
| sync_audio_stream->config().voe_channel_id); |
| } else { |
| video_stream->SetSyncChannel(voice_engine(), -1); |
| } |
| } |
| } |
| |
| PacketReceiver::DeliveryStatus Call::DeliverRtcp(MediaType media_type, |
| const uint8_t* packet, |
| size_t length) { |
| TRACE_EVENT0("webrtc", "Call::DeliverRtcp"); |
| // TODO(pbos): Make sure it's a valid packet. |
| // Return DELIVERY_UNKNOWN_SSRC if it can be determined that |
| // there's no receiver of the packet. |
| received_rtcp_bytes_ += length; |
| bool rtcp_delivered = false; |
| if (media_type == MediaType::ANY || media_type == MediaType::VIDEO) { |
| ReadLockScoped read_lock(*receive_crit_); |
| for (VideoReceiveStream* stream : video_receive_streams_) { |
| if (stream->DeliverRtcp(packet, length)) |
| rtcp_delivered = true; |
| } |
| } |
| if (media_type == MediaType::ANY || media_type == MediaType::AUDIO) { |
| ReadLockScoped read_lock(*receive_crit_); |
| for (auto& kv : audio_receive_ssrcs_) { |
| if (kv.second->DeliverRtcp(packet, length)) |
| rtcp_delivered = true; |
| } |
| } |
| if (media_type == MediaType::ANY || media_type == MediaType::VIDEO) { |
| ReadLockScoped read_lock(*send_crit_); |
| for (VideoSendStream* stream : video_send_streams_) { |
| if (stream->DeliverRtcp(packet, length)) |
| rtcp_delivered = true; |
| } |
| } |
| if (media_type == MediaType::ANY || media_type == MediaType::AUDIO) { |
| ReadLockScoped read_lock(*send_crit_); |
| for (auto& kv : audio_send_ssrcs_) { |
| if (kv.second->DeliverRtcp(packet, length)) |
| rtcp_delivered = true; |
| } |
| } |
| |
| if (event_log_ && rtcp_delivered) |
| event_log_->LogRtcpPacket(kIncomingPacket, media_type, packet, length); |
| |
| return rtcp_delivered ? DELIVERY_OK : DELIVERY_PACKET_ERROR; |
| } |
| |
| PacketReceiver::DeliveryStatus Call::DeliverRtp(MediaType media_type, |
| const uint8_t* packet, |
| size_t length, |
| const PacketTime& packet_time) { |
| TRACE_EVENT0("webrtc", "Call::DeliverRtp"); |
| // Minimum RTP header size. |
| if (length < 12) |
| return DELIVERY_PACKET_ERROR; |
| |
| last_rtp_packet_received_ms_ = clock_->TimeInMilliseconds(); |
| if (first_rtp_packet_received_ms_ == -1) |
| first_rtp_packet_received_ms_ = last_rtp_packet_received_ms_; |
| |
| uint32_t ssrc = ByteReader<uint32_t>::ReadBigEndian(&packet[8]); |
| ReadLockScoped read_lock(*receive_crit_); |
| if (media_type == MediaType::ANY || media_type == MediaType::AUDIO) { |
| auto it = audio_receive_ssrcs_.find(ssrc); |
| if (it != audio_receive_ssrcs_.end()) { |
| received_audio_bytes_ += length; |
| auto status = it->second->DeliverRtp(packet, length, packet_time) |
| ? DELIVERY_OK |
| : DELIVERY_PACKET_ERROR; |
| if (status == DELIVERY_OK) |
| event_log_->LogRtpHeader(kIncomingPacket, media_type, packet, length); |
| return status; |
| } |
| } |
| if (media_type == MediaType::ANY || media_type == MediaType::VIDEO) { |
| auto it = video_receive_ssrcs_.find(ssrc); |
| if (it != video_receive_ssrcs_.end()) { |
| received_video_bytes_ += length; |
| auto status = it->second->DeliverRtp(packet, length, packet_time) |
| ? DELIVERY_OK |
| : DELIVERY_PACKET_ERROR; |
| if (status == DELIVERY_OK) |
| event_log_->LogRtpHeader(kIncomingPacket, media_type, packet, length); |
| return status; |
| } |
| } |
| return DELIVERY_UNKNOWN_SSRC; |
| } |
| |
| PacketReceiver::DeliveryStatus Call::DeliverPacket( |
| MediaType media_type, |
| const uint8_t* packet, |
| size_t length, |
| const PacketTime& packet_time) { |
| // TODO(solenberg): Tests call this function on a network thread, libjingle |
| // calls on the worker thread. We should move towards always using a network |
| // thread. Then this check can be enabled. |
| // RTC_DCHECK(!configuration_thread_checker_.CalledOnValidThread()); |
| if (RtpHeaderParser::IsRtcp(packet, length)) |
| return DeliverRtcp(media_type, packet, length); |
| |
| return DeliverRtp(media_type, packet, length, packet_time); |
| } |
| |
| } // namespace internal |
| } // namespace webrtc |
